Obviously, you'll need to take more biotics into battle and rack up those points to be in with a chance of snagging the commendation pack that's on offer as a reward. Here's the details via the BioWare blog:

"Event Description: Recent setbacks have prompted changes in unit composition. Turian cabal theory is now dominant training paradigm. N7 units will now be deployed with pairs or higher percentages of biotics wherever available to maximize effectiveness.

Individual Goal: Earn 20,000 Biotic Explosion points on any map at any difficulty. You will need to kill the enemy with the explosion for the points to count. Points are cumulative across matches. Extraction not required.

Reward: Commendation Pack"

Mass Effect 3 Operation: Detonator will be commencing today, and running until December 2nd.